My Model 32 is failing to fire the bottom barrel every time. The times it fails there is a very light strike on the primer. It will usually fire after recocking the hammer. This time primer has a normal hit. I have removed the stock, cleaned the action and unable to see anything abnormal. I suspect the hammer spring may be the problem but cannot see it. The firing pin appears to OK based on it is moving and visual appearance. The thought of trying to remove the hammer to examine the spring has run through my mind but I would think it might require special tools to re-install. (I have several hammer springs) Trying to avoid shipping to factory as I have a shoot next weekend. Any suggestions? Thanks.